diff --git a/src/StreamSelectLoop.php b/src/StreamSelectLoop.php
index e51a27f8..36fcac21 100644
--- a/src/StreamSelectLoop.php
+++ b/src/StreamSelectLoop.php
@@ -159,7 +159,29 @@ public function tick()
$this->timers->tick();
- $this->waitForStreamActivity(0);
+ // Next-tick or future-tick queues have pending callbacks ...
+ if (!$this->nextTickQueue->isEmpty() || !$this->futureTickQueue->isEmpty()) {
+ $timeout = 0;
+
+ // There is a pending timer, only block until it is due ...
+ } elseif ($scheduledAt = $this->timers->getFirst()) {
+ $timeout = $scheduledAt - $this->timers->getTime();
+ if ($timeout < 0) {
+ $timeout = 0;
+ } else {
+ $timeout *= self::MICROSECONDS_PER_SECOND;
+ }
+
+ // The only possible event is stream activity, so wait forever ...
+ } elseif ($this->readStreams || $this->writeStreams) {
+ $timeout = null;
+
+ // There's nothing left to do ...
+ } else {
+ return;
+ }
+
+ $this->waitForStreamActivity($timeout);
}
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